Diaphragm-mounting.



H. D. PENNEY.

DIAPHRAGM MOUNTING.

APPLICATION map JUNE 28. $9l6.

1,299,604. Patented Apr. 8,1919.

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W I QM MW UNITED S'IUXLES PATENT OFFICE.

HAROLD D. PENNEY, OF PELHAM, NEW YORK, ASSIGNOR TO ROBERT L. MGELROY, OF NEW YORK, N. Y.

DIAPHRAGM-HOUR TIN G.

. Specification of Letters Patent.

Application filed June 28, 1916. Serial No. 106,304.

To all whom it may concern:

Be it known that I, HAROLD D. PENNEY, a

of New York, have invented certain new and useful Improvements in Diaphragm-Mounting's, of which the following is a specification.

My. present invention relates to an improvement in diaphragm mountings and has for its object the provision of a novel form of attachment of the mica diaphragm to the sound-box, housing, or in the present instance, a frame, which may be attached to the sound-box in the customary manner, and is similar in some respects to and has for its accomplishment the same purpose as set forth in my copending application, Serial No. 106 303, filed June 28, 1916, of even date herewith, wherein there is also shown the use of a resilient or yielding means between the diaphragm-disk and its mounting frame or anchorage, but the same differs greatly inconstruction from the device herein shown.

One of the objects of my invention is to so mount the usual diaphragm as to not only cause it to become integral with its mount and to hold it in operative position therewith, but also to provide that the means for mounting the said only. be economical in manufacture, but will tend to increase the tone volume of the diaphragm by permitting a greater amplitude or movement ofthe diaphragm, thereby displacing a greater volume of air.

To the accomplishment of the above stated object, and others of a similar nature, my invention consists in the construction, combination and arrangement of parts set forth in and falling within the claims forming'part hereof. And it should be understood that I do not-confine myself to all the details of construction, as there may bemodification,

thereof and variation therein without departing from the spirit of my invention or exceeding the scope of the claims.

In the accompanying drawings, Figure l is a front elevation of my device.

Fig. 2 is a sectional view thereof taken on the line 1--1, of Fig. 1.

Fig. 3 is an enlarged fragmental section thereof, showing the components, and

Fig. 4 shows one method of mounting the diaphragm in its frame.

diaphragm will not Heretofore in diaphragm mountings it has been the custom to provide either in a ring frame which may be screwed into the housing of a diaphragm, or in the housing itself, a suitable recess into which a sheet of resilient compound, usually a ring of rubber, is placed and the mica diaphragm is thereafter placed in position and another insulator rubber ring is placed thereon and then a metallic retaining ring is screwed into position clamping the diaphragm between two rubber seats, thereby preventing contact with the metallic parts thereof and forming a semi resilient seat, under compression, whereby to prevent the so called singing of the diaphragm when in use.

In my invention, as indicated in Figs. 2, 3 and 4, I provide an annular holder member 1 which is provided with threads 2, in the customary manner, whereby the said diaphragm and holder may be screwed in and out of the sound-box for replacement and repairs, and instead of clamping the diaphragm 5 rigidly between two yielding members and a non-yielding n1ember,I provide a simple recess 3 in the annular frame v or holder member 1, and with the diaphragm 5 being held in operative position in said recess 3, I cause to be introduced in said recess, and in and around said diaphragm, a filling of Para rubberfi, which rubber not only fills all of the recess 3, but also surrounds the edges of the diaphragm 5. The assembly, as above described, is then placed in suitable molds, such as 6 and 7, and the annular frame and diaphragm are thereupon vulcanized together, without tension or compression of the diaphragm.

It is obvious that the molds preferably should beso arranged as to not only mold the resilient filler t to the desired conformation, but so that it will also locate the diaphragm to the desired depth in the recess 3, and also mercial manufacturing of such diaphragm,

would be about as above set forth. 7

While I use Para rubber owing to its resilienc and toughness other suitable materials mig t be used in substitution therefor without departing from the spirit of my inven- Pateiited Apr. 8,1919.

tion. It is obvious, owing to the construction set forth, that the diaphragm is mounted in its holder frame in such a manner that While it is held against singing vibration it is also firmly connected with the said annular member by a non-vibrant yielding connection, and that therefore, the diaphragm is permitted a greater scope of movement, the said diaphragm being substantially permitted toiloat-in its frame connections, and that in use, the amplitude of the diaphragm will be greater, thereby effecting a greater volume of air, and hence, increasing the amount of sound that may 'be obtained therefrom. I

I claim:

1. A diaphragm mounting comprising an annular-holder or ring-frame having an an nular recess in the inner peripheral Wall, a diaphragm disk,'and an annular supporting ring of soft, lastic, resilient material, located in saidreoess and secured thereto and inclosing and secured to the peripheral edge of the diaphragm disk whereby to provide a floating annular support to hold the dia' phragm disk in operative position.

2. A diaphragm mounting comprising an annular-holder or ring-frame having a two- Walled annular recess 1n the inner peripheral Wall face, a diaphragm disk, and aninside supporting ring of soft, elastic, resilient mation.

terial, located in said recess and secured thereto and inclosing and secured to the peripheral edge of the diaphragm disk to inclose the entire peripheral edge thereof and hold the diaphragm disk resiliently and in operative position at a predetermined distance from the Walls of the annular recess of the annular-holder or ring-frame.

3. A diaphragm mounting comprising an annular-holder or frame-ring having a twowalled annular recess in the inner peripheralWall face, said recess being open toward the face and also toward the center of the annular-holder or ring-frame, the Wall from the side face of the recess being substantially at a right angle to the Wall leading from the peripheral Wall face, a diaphragm disk, and an annular supporting ring of soft, elastic, resilient material, located in said annular recess and secured thereto and inclosing and secured to the peripheral edge of the diaphragm disk, and forming a floating annular support to hold the diaphragm disk by its periphery, without use of other means, a predetermined distance from the Walls of said annular recess and in operative posi HAROLD D. PENNEY. Witnesses:

JAMES POWERS,

HENRY I. SIEGEL. 

